JP7364091B2 - Internal combustion engine auxiliary equipment mounting structure - Google Patents

Description

The present disclosure relates to an auxiliary equipment mounting structure for an internal combustion engine.

Various auxiliary machines are attached to an internal combustion engine (engine), and power is transmitted to the auxiliary machines such as a generator and a water pump via a belt or chain. Furthermore, an auxiliary device is also known that uses a BSG (belt starter generator) to start the engine or assist the driving force of the engine.

Various proposals have been made regarding the mounting structure of these auxiliary machines to the engine. For example, Patent Document 1 discloses an auxiliary equipment mounting structure that is attached to an internal combustion engine via a bracket, in which the casing of a water pump that is attached to the side wall of the internal combustion engine body supports an ACG (generator) as an auxiliary equipment. A structure that also serves as a supporting bracket is shown. It is also shown that the casing bracket is formed with bolt holes into which bolts for fixing the casing bracket to the engine body are inserted, and that approximately X-shaped ribs are formed to connect the bolt holes (patent (See Figures 1 and 4(a) of Document 1).

Further, Patent Document 2 discloses a structure that supports an alternator as an auxiliary device to which power is transmitted from the engine body via a belt, and the alternator is connected to the alternator via a plurality of attachment parts protruding from the alternator body. is shown supported by a chain cover that covers the timing chain. It is also shown that the alternator may be supported by the engine body.

Japanese Patent Application Publication No. 2015-151863 Japanese Patent Application Publication No. 2018-66301

As mentioned above, Patent Document 1 shows a structure in which the casing of a water pump attached to the side wall of an internal combustion engine body also serves as a bracket for supporting an ACG (generator) as an auxiliary machine. Moreover, Patent Document 2 shows that an alternator as an auxiliary device is supported by a chain cover via a plurality of attachment parts, and also shows that it may be supported by an engine body.

However, neither Patent Document 1 nor Patent Document 2 discloses that the auxiliary equipment is fixed to the internal combustion engine via a bracket that is fixed across the chain cover and cylinder block of the internal combustion engine.

On the other hand, driving force is applied from the engine to auxiliary equipment such as generators and water pumps. Additionally, an even greater force is applied to auxiliary equipment such as the BSG, as the BSG starts the engine and assists the engine's driving force to move the vehicle. Therefore, the bracket that fixes the auxiliary machine to the engine is required to have the strength to firmly fix it to the engine.

Therefore, in view of the above-mentioned problems, at least one embodiment of the present invention fixes a bracket for fixing an auxiliary machine to an internal combustion engine so as to straddle a case covering an endless transmission member of the internal combustion engine and a cylinder block. An object of the present invention is to provide an auxiliary equipment mounting structure for an internal combustion engine that can firmly fix a bracket to an engine.

(1) Invented to achieve the above-mentioned object, at least one embodiment of the present invention is such that an auxiliary machine that transmits power to and from an internal combustion engine is fixed to the internal combustion engine via a bracket. An auxiliary equipment mounting structure for an internal combustion engine, wherein a case is provided at an end of the internal combustion engine to cover an endless transmission member that transmits rotation of a crankshaft to a camshaft, and the bracket is configured to attach the bracket to the internal combustion engine. The bracket has a bracket fixing part that is fixed to the case and the cylinder block of the internal combustion engine, and the bracket has a fixing part that is fixed to the case and a cylinder block of the internal combustion engine. It is characterized by being fixed astride.

According to such a configuration, the bracket is provided with a bracket fixing portion that fixes the bracket to each of the case and the cylinder block, and the bracket is fixed across the case and the cylinder block, so that no supplementary parts can be provided. The load applied to the machine is distributed between the case side and the cylinder block side via the bracket. As a result, the auxiliary equipment and the bracket can be firmly fixed to the internal combustion engine.

Furthermore, since the bracket is fixed across the case and the cylinder block, the bracket can strengthen the connection between the case and the cylinder block, thereby improving the rigidity of the connection between the case and the cylinder block. This makes it possible to suppress oil from seeping out from between the case and the cylinder block. Further, the generation of noise and vibration can be suppressed.

(2) In some embodiments, the bracket has an auxiliary equipment mounting part that attaches the auxiliary equipment to the bracket, and the auxiliary equipment mounting part is provided on each of the case side and the cylinder block side. located on the side of

According to such a configuration, the auxiliary equipment mounting portions for attaching the auxiliary equipment to the bracket are provided on each of the case side and the cylinder block side, so that the attachment of the auxiliary equipment to the bracket can be stabilized. .

(3) In some embodiments, the bracket is provided with a rib so as to connect the plurality of auxiliary equipment mounting portions, and the rib is provided across the case side and the cylinder block side. It will be done.

According to such a configuration, the ribs are provided so as to connect the locations (auxiliary equipment mounting portions) to which a large force is applied during the operation of the auxiliary equipment, so that the strength of the bracket can be ensured. Furthermore, since the ribs are provided across the case side and the cylinder block side, the joint rigidity between the case and the cylinder block can be improved.

(4) In some embodiments, the rib is formed to extend in an X-shape with the bracket fixing portion as an intersection point.

According to such a configuration, by arranging the bracket fixing portion at the intersection (center) of the ribs, the bracket is stably fixed to the internal combustion engine and the strength of the bracket is ensured. Furthermore, since the rib extends from the bracket fixing portion, displacement of the case relative to the cylinder block can be suppressed.

(5) In some embodiments, the direction in which the bracket is bolted to the internal combustion engine at at least one of the plurality of bracket fixing portions is configured to be different from the direction in which the bolt is fixed in other locations.

According to such a configuration, the bracket can be stably fixed not only against load input from one specific direction but also against input from different directions.

(6) In some embodiments, the auxiliary equipment mounting part for attaching the auxiliary equipment to the bracket is sandwiched between the two bracket fixing parts having different bolt fixing directions when the bracket is viewed from the front. provided at the location.

According to such a configuration, the auxiliary equipment mounting part is provided at a position sandwiched between the two bracket fixing parts having different bolt fixing directions, so when the auxiliary equipment is in operation, there is a large amount of damage to the auxiliary equipment mounting part. Even if a force is applied, the vibration of the auxiliary equipment can be suppressed. Furthermore, since the auxiliary device mounting portion is sandwiched between the bracket fixing portions that are fixed from different directions, the attachment at the auxiliary device mounting portion becomes more stable.

(7) In some embodiments, a delivery pipe for supplying fuel to the internal combustion engine is disposed between the bracket and the cylinder block.

With this configuration, the delivery pipe is protected by the bracket and the auxiliary equipment attached to the bracket in the event of a vehicle collision.

According to at least one embodiment of the present invention, the bracket for fixing the accessory to the internal combustion engine is fixed across the cylinder block and the case that covers the endless transmission member of the internal combustion engine, thereby fixing the accessory and the bracket to the internal combustion engine. It can be firmly fixed to the engine.

FIG. 2 is a schematic side view of the engine showing a state in which a bracket is attached in an auxiliary equipment mounting structure for an internal combustion engine according to an embodiment of the present invention. FIG. 2 is a schematic front view of the engine showing a tensioned state of a belt that drives an auxiliary machine. FIG. 2 is an enlarged perspective view of the main parts from the front of the engine, showing how the bracket is attached. FIG. 2 is an enlarged perspective view of the main parts from the rear of the engine, showing how the bracket is attached. FIG. 2 is an enlarged perspective view of main parts from the front of the engine, showing a state in which the BSG is attached to the bracket. FIG. 2 is a schematic side view of the engine showing an overlapping state of a delivery pipe, a bracket, and a BSG.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. However, the relative arrangement of components described in the embodiments or shown in the drawings is not intended to limit the scope of the present invention thereto, and is merely an illustrative example. Note that the directions of up, down, front, back, left, and right in the description are defined as the direction in which the passenger looks forward from the driver's seat. In each figure, "FR" indicates forward, "RH" indicates right, and "UPR" indicates upward.

FIG. 1 shows a schematic side view of an engine 1 showing an auxiliary equipment mounting structure for an internal combustion engine 1 according to an embodiment of the present invention. In FIG. 1, an engine 1 is housed in an engine room at the front of a vehicle (not shown), and is supported by a vehicle body frame via an engine mount.

Further, the engine 1 is, for example, an in-line multi-cylinder gasoline engine, and is a horizontally mounted engine in which the crankshaft 5 of the engine body 3 is arranged to extend in the vehicle width direction. FIG. 1 shows a state in which the front side of the engine body 3 is placed on the right side of the vehicle. Moreover, FIG. 1 is a side view of the engine 1 from the front side of the vehicle.

The engine body 3 includes a cylinder block 7 and a cylinder head 9 above the cylinder block 7. A chain case (case) 11 is coupled to the front side of the engine body 3, and an oil pan 13 is provided on the lower side of the engine body 3.

The chain case 11 is fixed to the front surfaces of the cylinder block 7 and the cylinder head 9 by a plurality of fixing bolts 14 so as to cover the front sides of the cylinder block 7 and the cylinder head 9. Further, an intake manifold 10 is installed in the cylinder head 9.

A chain case chamber is formed in a space inside the chain case 11, and the chain case chamber transmits the rotation of the crankshaft 5 disposed in the cylinder block 7 to a camshaft (not shown) disposed in the cylinder head 9. A timing chain 15 as an endless transmission member is arranged.

The timing chain 15 is wound around a camshaft sprocket connected to the front end of a camshaft (not shown) on the intake side and the exhaust side, and a crankshaft sprocket 17 connected to the front end of the crankshaft 5. As a result, the timing chain 15 moves in conjunction with the rotation of the crankshaft 5, the rotation is transmitted to the camshaft sprocket, and the camshaft rotates.

The further front end side of the crankshaft sprocket 17 protrudes from the front end surface of the chain case 11, and a crank pulley 19 is coupled to the protruding portion. An auxiliary belt 23 that transmits driving force to the auxiliary machine 21 or from the auxiliary machine 21 to the engine 1 is wound around the crank pulley 19 .

As shown in FIG. 2, the auxiliary equipment 21 includes, for example, a BSG (belt starter generator) 25, a water pump 27 for engine cooling water, and an A/C (for air conditioner) connected to the crank pulley 19 via an auxiliary equipment belt 23, as shown in FIG. compressor) 29 is connected.

A pendulum type belt tensioner 35 that can swing around the same rotational axis as the BSG pulley 31 and has tension pulleys 33a and 33b that are rotatable on the upstream and downstream sides of the BSG pulley 31 in the rotational direction, respectively. is provided so that the tension of the auxiliary belt 23 is maintained constant.

Additionally, idler pulleys 37 and 39 are provided between the water pump 27 and the BSG pulley 31 and between the A/C 29 and the crank pulley 19 to ensure the wrapping angle of the auxiliary belt 23. .

When starting the engine, the BSG 25 operates as a starter motor to start the engine 1. When the engine is running, the driving force of the engine 1 drives the water pump 27 and A/C 29, and the BSG 25 is also driven to generate electricity. be exposed. Furthermore, by driving the BSG 25 during engine operation, torque assist is provided during vehicle acceleration.

Next, the bracket 41 for fixing the BSG 25 as an auxiliary machine to the side wall of the engine 1 will be explained. As shown in FIGS. 1 and 3, the bracket 41 is made of one metal component, and as shown in FIG. It has a curved portion 43 that opens toward the outside of the engine 1 and curves. 4 shows a state before the BSG 25 is attached to the bracket 41, and FIG. 5 shows a state where the BSG 25 is attached to the bracket 41.

Further, as shown in FIGS. 1 and 3, the bracket 41 has a bracket fixing part P that fixes the bracket 41 to the chain case 11 and the cylinder block 7, respectively. Fixed across. Note that the bracket fixing portion P includes first to fifth fixing points P1 to P5, which will be described later.

Among the bracket fixing parts P, there are four fixing points fixed to the cylinder block 7: a first fixing point P1, a second fixing point P2, a third fixing point P3, and a fourth fixing point P4, which are fixed to the side wall of the cylinder block 7. A place will be set up. Among the bracket fixing parts P, a fifth fixing point P5 fixed to the side wall of the chain case 11 is provided as a part fixed to the chain case 11.

In this way, the bracket 41 is provided with a bracket fixing part P having a fixing part that fixes the bracket 41 to the chain case 11 and the cylinder block 7, respectively. Since it is fixed across the chain case 11 side and the cylinder block 7 side, the load applied to the BSG 25, which is an auxiliary machine, is distributed via the bracket 41 to the chain case 11 side and the cylinder block 7 side. As a result, the BSG 25 and the bracket 41 can be firmly fixed to the engine 1.

In the case of an auxiliary device such as the BSG25, the bracket 41 starts the engine 1 and assists the driving force of the engine 1 to move the vehicle, so compared to the auxiliary devices such as the water pump 27 and A/C 29, the bracket 41 is Since a large force is applied, the bracket 41 that supports the BSG 25 is required to have strong strength. Therefore, the bracket 41 of the present invention is suitable for fixing the BSG 25.

Furthermore, since the bracket 41 is fixed across the chain case 11 and the cylinder block 7, the bracket 41 strengthens the connection between the chain case 11 and the cylinder block 7, and increases the rigidity of the connection between the chain case 11 and the cylinder block 7. can be improved. Thereby, it is possible to suppress oil from seeping out from between the chain case 11 and the cylinder block 7. Further, the generation of noise and vibration can be suppressed.

As shown in FIGS. 1 and 3, the bracket 41 has four fixed points fixed to the side wall of the cylinder block 7: a first fixed point P1, a second fixed point P2, a third fixed point P3, and a fourth fixed point P4. and one fifth fixing point P5 fixed to the side wall of the chain case 11. The positions of the first to fifth fixing points P1 to P5 are located at the peripheral edge of the bracket 41 when viewed from the front (side view of the engine 1 with the bracket 41 fixed to the engine 1). It is set in.

In this way, since each fixing point position is provided at the peripheral edge of the bracket 41 in the front view shape of the bracket 41, in other words, it is positioned so as to fix the end of the bracket 41. The fixation to the engine 1 becomes stable.

Further, as shown in FIGS. 1 and 3, the first fixed point P1, the second fixed point P2, the third fixed point P3, and the fifth fixed point P5 are fixed from the front side of the vehicle (engine 1) using fixing bolts 47, respectively. At the fourth fixing point P4, the fixing bolt 49 is fixed from the right side of the vehicle (from the front side of the engine 1).

At this fourth fixing point P4, the side wall of the cylinder block 7 protrudes outward, and a protrusion 51 is provided in which a through hole through which the fixing bolt 49 passes is formed. One arm 53a and the other arm 53b are provided on the bracket 41.

A fixing bolt 49 is inserted from the side surface of one arm 53a, passes through the inside of the protrusion 51, and is screwed into a nut portion provided on the side surface of the other arm 53b. In this way, at the fourth fixing point P4, the bracket 41 is fixed to the cylinder block 7 from the right side of the vehicle (from the front side of the engine 1) by the fixing bolt 49.

In this way, the fixing direction of the fixing bolt 49 that fixes the bracket 41 to the engine 1 is configured to be different from the fixing direction of the fixing bolt 47 at other locations, so that the fixing direction is different from the fixing direction of the fixing bolt 47 at other locations. The fixation of the bracket 41 is stabilized not only against inputs from different directions, but also against inputs from different directions.

Next, the auxiliary equipment mounting portion Q for attaching the BSG 25 as an auxiliary equipment to the bracket 41 will be explained. Note that the auxiliary equipment mounting portion Q includes first to fourth mounting points Q1 to Q4, which will be described later.

As shown in FIGS. 1 and 3, four auxiliary equipment mounting portions Q are provided: a first mounting point Q1, a second mounting point Q2, a third mounting point Q3, and a fourth mounting point Q4. A screw hole 57 into which a fixing bolt 55 for attaching the BSG 25 is screwed is formed in each of the attachment points Q1, Q2, Q3, and Q4 of the auxiliary equipment attachment portion Q.

As shown in FIGS. 3 and 4, the auxiliary equipment mounting portions Q are located at the open ends of the curved portions 43 of the bracket 41, and are provided above and below the bracket 41, respectively. The first attachment point Q1 and the second attachment point Q2 are located on the upper side, and the third attachment point Q3 and the fourth attachment point Q4 are located on the lower side.

Further, the auxiliary equipment mounting portions Q are provided at two locations on the left and right in each of the upper and lower positions. The two left and right locations are located on the chain case 11 side and the cylinder block 7 side, respectively. In FIG. 1, the chain case 11 side and the cylinder block 7 side are separated by a boundary line AA. A first attachment point Q1 and a third attachment point Q3 are located on the chain case 11 side, and a second attachment point Q2 and a fourth attachment point Q4 are located on the cylinder block 7 side.

In this way, the auxiliary equipment mounting parts Q are provided in the upper and lower positions, and are further provided in the left and right sides on the chain case 11 side and the cylinder block 7 side, so that the BSG 25 The attachment to the bracket 41 can be stabilized.

Further, as shown in FIGS. 1 and 3, the bracket 41 has a rib 59 connecting the first attachment point Q1 and the fourth attachment point Q4, and a rib 59 connecting the second attachment point Q2 and the third attachment point Q3. Ribs 61 are provided to connect the two. Furthermore, these ribs 59 and 61 are provided across the chain case 11 side and the cylinder block 7 side.

In this way, the ribs 59 and 61 are provided so as to connect the parts (auxiliary equipment mounting part Q) to which a large force is applied during operation of the BSG 25, so that the strength of the bracket 41 can be ensured. Furthermore, since the ribs 59 and 61 are provided across the chain case 11 side and the cylinder block 7 side, the joint rigidity between the chain case 11 and the cylinder block 7 can be effectively improved. That is, the bracket 41 reinforced by the ribs 59 and 61 further improves the strength of the connection between the chain case 11 and the cylinder block 7, which is effective in improving the rigidity of the connection.

Further, as shown in FIGS. 1 and 3, the ribs 59 and 61 are formed to extend in an X-shape with the second fixing point P2 of the bracket fixing portion P as an intersection point.

In this way, by arranging the second fixing point P2 of the bracket fixing part P at the intersection (center) of the ribs 59 and 61, fixing of the bracket 41 to the engine 1 (cylinder block 7 and chain case 11) is stabilized. At the same time, the strength of the bracket 41 is ensured. Furthermore, since the ribs 59 and 61 extend from the second fixing point P2 of the bracket fixing portion P, the rigidity of the chain case 11 connected to the cylinder block 7 can be improved.

Further, as shown in FIGS. 1 and 3, the auxiliary equipment mounting portion Q is located at a position sandwiched between two bracket fixing portions P in which fixing bolts 47 and 49 are fixed in different directions when viewed from the front of the bracket 41. It is set in.

That is, the third attachment point Q3 of the auxiliary equipment attachment part Q is located between the second fixation point P2 and the fourth fixation point P4 of the bracket fixation part P in the vertical direction. A fourth attachment point Q4 of the accessory attachment portion Q is located between the point P3 and the fourth fixed point P4 in the vertical direction.

In this way, the third attachment point Q3 of the auxiliary equipment attachment part Q is sandwiched between the second fixation point P2 and the fourth fixation point P4 of the bracket fixation part P, which have two different bolt fixation directions. Also, the fourth attachment point Q4 of the auxiliary equipment attachment part Q is between the third fixation point P3 and the fourth fixation point P4 of the bracket fixation part P, which have two different bolt fixation directions. Since it is provided in a sandwiched position, even if a large force is applied to the third attachment point Q3 and the fourth attachment point Q4 of the auxiliary equipment attachment part Q when the BSG 25 is in operation, it is possible to suppress the deflection of the BSG 25.

Furthermore, since the third attachment point Q3 and the fourth attachment point Q4 are sandwiched between the bracket fixing parts that are fixed from different directions, it is easier to attach the BSG 25 at the third attachment point Q3 and the fourth attachment point Q4. Stabilize.

In addition, when the BSG25 is in operation, a larger force is likely to be applied to the lower mounting point than the upper one, so the auxiliary equipment mounting part Q, which is sandwiched between the two bracket fixing parts P that have different bolt fixing directions, is attached to the BSG25. By setting the third and fourth attachment points Q3 and Q4 for attaching to the bracket 41 below, it is possible to efficiently suppress vibration of the BSG 25.

Note that the two bracket fixing parts P having different bolt fixing directions may be provided so as to sandwich the auxiliary equipment mounting part Q between them, and sandwich the first mounting point Q1 and the second mounting point Q2 between them. Alternatively, the first attachment point Q1 and the second attachment point Q2, which are auxiliary equipment attachment parts Q for attaching the upper part of the BSG 25 to the bracket 41, and the auxiliary equipment attachment point Q2 for attaching the lower part of the BSG 25 to the bracket 41, may be provided. It may be provided for each of the third attachment point Q3 and the fourth attachment point Q4, which are the attachment portions Q.

As shown in FIGS. 1, 4, and 6, a delivery pipe 63 that supplies fuel to the engine 1 is arranged between the bracket 41 and the cylinder block 7. That is, one end portion of the delivery pipe 63 that supplies fuel to an in-cylinder fuel injection valve (not shown) is located between the bracket 41 and the cylinder block 7. Further, a fuel pressure sensor 65 is installed in the delivery pipe 63.

FIG. 6 is a schematic side view of the engine of FIG. 1, showing a state in which the BSG 25 is attached, and the configuration is the same as that shown in FIG. 1 except that the BSG 25 and the BSG pulley 31 are shown with chain double-dashed lines.

When the BSG 25 is attached to the bracket 41, one end of the delivery pipe 63 is placed between the bracket 41 and BSG 25 and the cylinder block 7, as shown by the hatched part H in FIG. One end portion of the pipe 63 is covered by the bracket 41 and the BSG 25.

Although the delivery pipe 63 is shown as an example of a delivery pipe that supplies fuel to an in-cylinder fuel injection valve, it may also be a delivery pipe that supplies fuel to an intake passage fuel injection valve.

In this way, the delivery pipe 63 that supplies fuel to the engine 1 is arranged between the bracket 41 and the cylinder block 7, so when the BSG 25 is attached to the bracket 41, one end portion of the delivery pipe 63 is placed between the bracket 41 and the cylinder block 7. 41 and BSG25. Therefore, in the event of a vehicle collision, the delivery pipe 63 can be protected by the bracket 41 and the BSG 25 attached to the bracket 41.

In the above embodiment, the endless transmission member is the timing chain 15, but it may be a timing belt.

This application is based on Japanese Patent Application No. 2020-144217 filed on August 28, 2020, the contents of which are incorporated herein by reference.

According to at least one embodiment of the present invention, by fixing the bracket 41 that fixes the BSG 25, which is an auxiliary machine, to the engine 1 across the chain case 11 and the cylinder block 7 of the engine 1, the BSG 25 and the bracket 41 are fixed. can be firmly fixed to the engine 1, so it is suitable for use in an engine auxiliary equipment mounting structure.

1 Engine (internal combustion engine)
3 Engine body 5 Crankshaft 7 Cylinder block 9 Cylinder head 10 Intake manifold 11 Chain case (case)
13 Oil pan 14, 47, 49, 55 Fixing bolt 15 Timing chain (endless transmission member)
17 Crankshaft sprocket 19 Crank pulley 21 Auxiliary machine 23 Auxiliary machine belt 25 BSG (belt starter generator)
27 Water pump for engine cooling water 29 A/C (compressor for air conditioner)
41 Bracket 57 Screw holes 59, 61 Rib 63 Delivery pipe 65 Fuel pressure sensor P Bracket fixing part P1 First fixing point P2 Second fixing point P3 Third fixing point P4 Fourth fixing point P5 Fifth fixing point Q Auxiliary equipment mounting part Q1 1st attachment point Q2 2nd attachment point Q3 3rd attachment point Q4 4th attachment point A-A Boundary line H Hatching area

Claims (5)

An auxiliary equipment mounting structure for an internal combustion engine in which an auxiliary equipment that transmits power to and from the internal combustion engine is fixed to the internal combustion engine via a bracket,
A case is provided at an end of the internal combustion engine to cover an endless transmission member that transmits rotation of the crankshaft to a camshaft,
The bracket has a bracket fixing part that fixes the bracket to the internal combustion engine , and an auxiliary equipment mounting part that attaches the auxiliary equipment to the bracket,
The bracket fixing part has a fixing part to the case and a fixing part to the cylinder block of the internal combustion engine,
The bracket is fixed across the case and the cylinder block,
The auxiliary equipment mounting portion is located on each side of the case side and the cylinder block side,
The bracket is provided with a rib so as to span the case and the cylinder block,
An auxiliary equipment mounting structure for an internal combustion engine, wherein the rib is provided so as to connect the plurality of auxiliary equipment mounting parts. The auxiliary equipment mounting structure for an internal combustion engine according to claim 1, wherein the rib is formed to extend in an X-shape with the bracket fixing portion as an intersection point. 3. The internal combustion engine according to claim 1, wherein a direction in which the bracket is bolted to the internal combustion engine at at least one of the plurality of bracket fixing portions is different from a direction in which the bolt is fixed to the internal combustion engine at other locations. Auxiliary equipment mounting structure. An auxiliary equipment mounting portion for attaching the auxiliary equipment to the bracket is provided at a position sandwiched between two of the bracket fixing portions having mutually different bolt fixing directions when viewed from the front of the bracket. Auxiliary equipment mounting structure for an internal combustion engine according to item 3 . The auxiliary equipment mounting structure for an internal combustion engine according to any one of claims 1 to 4 , wherein a delivery pipe for supplying fuel to the internal combustion engine is arranged between the bracket and the cylinder block. .

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